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Based on thermal extraction (TE) and mild oxidation, a new two-step depolymerization method was presented to investigate the macromolecular structure of Xianfeng lignite (XL). The TE of XL was carried out at 320°C in 1-methylnaphthalene. The residue was oxidized with 5% H 2 O 2 aqueous solution at 40°C under normal nitrogen atmosphere for 4h. Most of organic matter in XL was solubilized...
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